Question

书面表达

根据提示写一篇短文，说明树林对人类的重要性。字数100-120。

1．树林可以美化环境（beautify the environment），有益于身心健康，它可以放出氧气，吸收二氧化碳（take in carbon dioxide）；木材也有很多用途，可用于建筑、造纸，制很多东西。更重要的是，树林能保持水土，防止水土流失。

2．我们要多种树，严禁乱砍滥伐，保护生态平衡（the balance of nature），氧气（oxygen）。

Answer 1

答案：略
解析：

Trees are very important to human beings. Firstly, trees can beautify the environment. Secondly, trees are useful for our health, they give out oxygen and take in carbon dioxide. Wood has many usage, too. It is used for more than building. It is also made into paper and many other things. And of the most importance, trees can keep soil and water from being lost. So we must do our best to protect trees from being cut down freely. We must plant as many trees as possible. We should keep the balance of nature.